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London's Congestion Charging Scheme (CCS), which was implemented back in 2003 to reduce traffic volume in central London, has had virtually no impact on air quality, according to a study published by the Health Effects Institute (HEI). The study, "The Impact of the Congestion Charging Scheme on Air Quality in London," was led by professor Frank Kelly of King's College London as part of HEI's research into measures that could positively impact health by improving air quality.

According to the Guardian, "Roadside air pollution in Hong Kong hit record highs in the first six months of the year, damaging public health and economic competitiveness compared with Asian rivals." This roadside air pollution is apparently damaging Hong Kong's reputation and is deterring visitors from setting foot in the city. Hong Kong claims that its diminishing air quality is exacerbated by imported pollution, a term that neighboring China has often used before.

The picturesque city of London has recorded its 36th "bad air" day this year after monitoring equipment detected dangerous levels of minute airborne particles. EU guidelines allow just 35 "bad air" days, so reaching this unfortunate level by the sixth month of the year means that London is in violation of the law and faces stiff fines and numerous court cases. Also, London's air pollution is now considered to be the worst in all of Europe.

We've heard many reports before regarding just how much impact electric vehicles (EVs) will have on the environment. Some claim a profound reduction of this while others suggest an increase of that. Of course, it's all speculation for now because it's hard to determine the EVs' actual impact until they take to the streets and long-term studies can be conducted.